1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb24970dc41ce338d8bb4e8fd4d02e7d0d380ef13afb0bc0d8de6c09bf9c88b70. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/60f41c4d-615a-40d1-94ec-d5e59e51099c.json and https://artists.proofprofile.net/proofs/artist/60f41c4d-615a-40d1-94ec-d5e59e51099c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Otaku's Revenge (feat. Vocaloid Hatsune Miku & Meiko)
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x615f0994aef58f547d283d81f92e6c6c22fd702ffb0a5f3645d9c60965a9fe5f. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:23:43Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAHA2360237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85d8cd47de5c34230804479703d63c2c2a58992da4e684e0985b00743d335fe3. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAHA2360244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4b826c3125bb7c18946fdb5386cff15bfc540ea0ec7aa322af2b989eafb1560. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAHA2360250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3340b8e3da629f324d9ffab7a5d9443386f43f1f9c31e663c8db95861847e65a. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAHA2360259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b2f9bc6c4d52ddec94462c7acbd6951ac469558919475450065bdc273ab9f81. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:29:42Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAHA2360267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a4470d03ff82b69ccd0f5f2c3db4f45a18955b40d0d86f855372d0ab798485b. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAHA2360272.